package foundation.translator;

import java.math.BigDecimal;
import java.util.Date;

import foundation.server.config.DBaseType;
import foundation.util.Util;


public class BooleanTranslator extends ITranslator {
	
	private static ITranslator helper;
	
	static {
		helper = new StringTranslator();
	}

	@Override
	public String toString(Object value) throws Exception {
		if (value == null || value == ValueType.Null) {
			return null;
		}
		
		Boolean bool = false;
		
		if (value instanceof Boolean) {
			bool = (Boolean) value;
		}
		else {
			bool = helper.toBoolean(value, false);
		}
		
		return bool.toString();
	}

	@Override
	public String toSqlString(DBaseType dbaseType, Object value) throws Exception {
		if (value == null || value == ValueType.Null) {
			return "null";
		}
		
		Boolean bool = false;
		
		if (value instanceof Boolean) {
			bool = (Boolean) value;
		}
		else {
			bool = helper.toBoolean(value, false);
		}
		
		if (bool) {
			return Util.quotedStr("T");
		}
		else {
			return Util.quotedStr("F");
		}
	}
	
	@Override
	public String toJSONString(Object value) throws Exception {
		if (value == null || value == ValueType.Null) {
			return "null";
		}
		
		Boolean bool = false;
		
		if (value instanceof Boolean) {
			bool = (Boolean) value;
		}
		else {
			bool = helper.toBoolean(value, false);
		}
		
		return bool.toString();
	}

	@Override
	public String toSchemaString(Object value) throws Exception {
		if (value == null || value == ValueType.Null) {
			return "";
		}
		
		Boolean bool = false;
		
		if (value instanceof Boolean) {
			bool = (Boolean) value;
		}
		else {
			bool = helper.toBoolean(value, false);
		}
		
		return bool.toString();
	}

	@Override
	public Integer toInteger(Object object) throws Exception {
		throw new Exception("can not translate boolean (" + object + ") to Integer");
	}

	@Override
	public Double toDouble(Object object) throws Exception {
		throw new Exception("can not translate boolean (" + object + ") to Double");
	}

	@Override
	public BigDecimal toBigDecimal(Object object) throws Exception {
		throw new Exception("can not translate boolean (" + object + ") to BigDecimal");
	}
	
	public Boolean toBoolean(Object object) throws Exception {
		if (object == null || object == ValueType.Null) {
			return false;
		}
	
		if (object instanceof String) {
			String value = String.valueOf(object).toLowerCase();
			
			if ("t".equals(value)) {
				return true;
			}
			
			if ("true".equals(value)) {
				return true;
			}
			
			if ("y".equals(value)) {
				return true;
			}
			
			if ("yes".equals(value)) {
				return true;
			}
			
			if ("是".equals(value)) {
				return true;
			}
			
			if ("1".equals(value)) {
				return true;
			}
			
			return false;
		}
		else if (object instanceof Integer) {
			Integer value = (Integer) object;
			return value == 1;
		}
		else if (object instanceof Boolean) {
			return (Boolean) object;
		}
		
		return Boolean.valueOf(object.toString());
	}

	@Override
	public Date toDate(Object object) throws Exception {
		throw new Exception("can not translate boolean (" + object + ") to Date");
	}

	@Override
	public Object toTranslatorTypeValue(Object value) throws Exception {
		if (value == null) {
			return null;
		}
		
		if (value instanceof Boolean) {
			return (Boolean)value ? "T" : "F";
		}
		
		return (String)value;
	}

	@Override
	public Object loadObjectFrom(String value) throws Exception {
		if (Util.isEmpty(value)) {
			return null;
		}
		
		value = value.toLowerCase();
		
		if ("t".equals(value)) {
			return true;
		}
		
		if ("true".equals(value)) {
			return true;
		}
		
		if ("y".equals(value)) {
			return true;
		}
		
		if ("yes".equals(value)) {
			return true;
		}
		
		return false;
	}
	
	@Override
	public Class<?> getDataClass() {
		return Boolean.class;
	}
}